ScotRail are about to introduce trains that are so old, the engine has been on display in a museum.
A fleet of 40-year-old diesel high-speed engines are due to start operating in 2018 in a bid to increase passenger capacity. They will be the oldest trains in ScotRails stock .
The InterCity 125 is used by Great Western Railway in England but is being replaced with electric stock.
One of the first made went on display at the National Railway Museum in York in October to mark its 40th anniversary.